Berlin 2008 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Poster II

DY 29.24: Poster

Donnerstag, 28. Februar 2008, 16:00–18:00, Poster C

Excitation of coherent oscillations in noisy medium — •Jan Köhler, Jörg Mayer Mayer, and Heinz Georg Schuster — Institut für Theoretische Physik und Astrophysik, Christian-Albrechts Universität, Olshausenstraße 40, 24098 Kiel, Germany

We study the influence of neuronal threshold modulation on the properties of cortical traveling waves. For that reason we simplify a Wilson-Cowan-type integro-differential equation model of propagating neo-cortical activity to a spatially discrete version. Further we introduce a noisy threshold. Depending on the noise level we find different states of the network activity, ranging from asynchronous oscillations, traveling waves, to synchronous oscillations. Finally we induce the transition between these different states by an external modulation.